...ns of July the 20th, 1863, included in it very many men who had never crossed the Potomac at all. I think it may be assumed as very certain that we had less than 60,000 effectives of all arms at Gettysburg , and that the battle was fought with something under 50,000 infantry and about 4,000 artillerymen on our side, the cavalry merely serving to protect our flanks and guard our trains, as from the natur...